Fix: Exchanging Coscine certificate - Step 2

coscine/issues#2147

src/STS/Startup.cs

-using Coscine.ApiCommons;
+using Coscine.ApiCommons;
 using Coscine.Api.STS.Data;
 using Coscine.Api.STS.Utils;
 using Microsoft.AspNetCore.Authentication.Cookies;
@@ -95,11 +95,11 @@ namespace Coscine.Api.STS
                     var passwordString = Program.Configuration.GetStringAndWait("coscine/global/sts/pfxpassword");
 
                     var x509Certificate2 = new X509Certificate2(pfx, passwordString);
-
+                    
                     options.SPOptions.ServiceCertificates.Add(x509Certificate2);
 
                     options.SPOptions.WantAssertionsSigned = true;
                 });
         }
     }
-}
\ No newline at end of file
+}